In-situ incorporation of Copper(Ⅱ) porphyrin functionalized zirconium MOF and TiO2 for efficient photocatalytic CO2 reduction

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2019,（13）
• 页码范围: 926-933
• 页数: 8页
• 语种: 英文

摘要

As one of the highly effective methods to prepare catalysts for photocatalytic reduction of CO2 into valueadded chemicals,using metalloporphyrin as light-harvesting mixed ligand to modify metal-organic framework (MOF) is very valuable since it can greatly improve the prophyrin dispersibility and consequently inhibit its potential agglomeration.Herein,we employed a one-pot synthetic strategy to chemically immobilize Cu(Ⅱ) tetra(4-carboxylphenyi)porphyrin (CuTCPP) into UiO-66 MOF structure through coordination mode.Meanwhile,in-situ growth of TiO2 nanoparticles onto the MOF is actualized with the generation of CuTCPP c UiO-66/TiO2 (CTU/TiO2) composites.Under Xe lamp irradiation (λ.＞ 300 nm),the catalytic result presents that an optimal value of 31.32 μmol g-1 h-1 CO evolution amount,about 7 times higher than that of pure TiO2 was obtained through the photocatalysis.It is supposed owning to a consistent augment of light absorption derived from chemically implanted porphyrin derivative,which is simultaneously functioning with an efficacious separation of photo-induced carries given by the newly engendered composites between MOF and TiO2,an effective catalytic activity and approving recyclability of CTU/TiO2 can be achieved in the photocatalytic reduction of CO2 into CO.